Table 5. Mean IFNγ response to M.tb PPD by vitamin D status, controlling for season of blood collection at 3 and 12 months post BCG, among vaccines.

		No. of infants	Mean IFNγ to M.tb PPD (pg/ml)	Mean difference in IFNγ to M.tb PPD between infants with low and high vitamin D (95% CI)	P value
3 months post BCG	Hypovitaminosis (<30 ng/ml)	20	2426	829 (84, 1575) *	0.030
	Sufficient Vitamin D (>30 ng/ml)	27	1597
	Adjusted for season of blood collection			883 (83, 1683) **	0.031
12 months post BCG	Vitamin D deficiency (<20 ng/ml)	18	1542	466 (−352, 1283) *	0.255
	Vitamin D (>20 ng/ml)	19	1076
	Adjusted for season of blood collection			523 (−375,1420) **	0.244

*unadjusted (“crude”),

**adjusted.